charlotte 4 alarms plus chemical plant

4700 sweden road off south blvd. large 2 story metal chemical plant. 140x70 l shaped building. an explosion rocked the area around the building about 2 pm today. first due units reported heavy smoke blocks out. 4 alarms sounded in quick order. all 18 workers inside were out. some roof collapse in areas of fire orgin. thought to be of accident in plant. over 100 city firefighters on scene 14 treated for heat and expousre problems.
haz mat clean up companies on scene and will be all night. still concern about run off and smoke in the area. 15 engines 5 ladders 3 haz mat units 4 bc 4 dc. some vfd on stand by for covering south side of city